BookH tia 
9. §. I fay therefore, that all kinds of Vegetable Principles, are 
either in or together with the Water, with lef difference firft received 
into a Plant. But when they are once therein 3 they.are then fépara- 
ted, that isto fay, filtred, {ome from others, in very different Propor- 
tions and Conjunéfions by the feveral Parts 5 the Watery by one Part, the 
Aery by another, the Oyly by another, and fothe reft: and fo every 
Part is the Receptacle of a Liquor, become peculiar, not by any Trans- 
formation, but only the Percolation of Parts out of the common Mafi 
or Stock of Sap. And fo all thofe parts of the Sap, which are fuper- 
flous to any kind of Plant, are at the fame time, difcharged back by 
Perfpirations, into the Aer. 
10. §. AND, that Nature, inthe various Percolations and Sepa- 
tions of the Sap, may {till the better anfwer her end; hence, it is, that 
fhe carefully feeth, not only to the fpecial Nature and Proportion of 
the Organs, by which fhe doth her work 5 but likewife to their very 
Pofttion. Thus it is obfervable, That whereas the Lympheduds, which 
carry a more Watery Liquor, are {till placed on the inner Verge of the 
Barque, next tothe Aer-Veffels ; the Laéiferous and Refiniferous Veffels 
of Plants, to whofe Oylie Liquor a.mixture of much Aer is incongru- 
ous ; do ufually ftand, neither on the inner, nor the outer verge of the 
Barque; but in the widle. By which means, they are at the greateft 
diftance, and fo moft fecure, from the Aer; either that which enters 
the Barque at the Circumference, or from the Wood and Pith. 
_ 11. 4. AND becaufe the Refizous Liquors of Plants are more 
Oily, than their Milky; their fecurity therefore, from the approach 
’ of the Aer, is yet further contrived. Inthat in Pive, and other Re- 
fivons Trees, the Diametral Infertions are never found 3 or at leaft, not 
viftble: which yet in other Trees, are confpicuous , being thofe Parts, 
whofe office it is) to introduce the Aer from the Aer-Vefels into the 
Barque. 
a gs. AGAIN, the Milky Liquors of Plants being thinner than 
the Refizous, and having a confiderable quantity of Water mixed with 
their Oyl; hence it is, that in Milky Plants, as in Rhws, there are a 
greater number of Lympheduits; and thofe ftanding nearer to the 
Milky Vefféls, than they do in Pive and the like; to the Refimous. By 
which means they are better fitted to affufe their Aqueous Parts more 
plentifully to the faid Milky Liquor. 
13. §. FROM the Mixture of Watery Parts withthe Oylie; it 
comes to pafs, that whereas all Lympha's, Mucilages, and Rofins are 
tranfparent 5 the Aque-oleous Liquors of Plants are Milky or white. 
or otherwife Opacous. For the fame thing is the caufe of the white- 
nefs of Vegetable, as of Animal-Milk : that isto fay, a more copious 
mixture of Watery and Oily Parts per minima, or intooneBody. For 
even the Serons and Oylie Parts of Animal Milk, when throughly 
feparated one from the other,they become very tranfparent. So the Siz/- 
latitious Oyl of Anife Seeds, is moft tranfparent and lipid, even as Wa- 
ter it felf: yet there is a known fort of White Anife-seed Water; asit is 
commonly called: that it isto fay, wherein the Oy/, in diftillation, 
arifeth and is mixed more plentifully with the Water. And the Wa- 
ter, whercin the ftillatitious Oy! of any Vegetable is diffolved, becomes (2) See thie 
a perfe&t white Milk 5 as in this Honourable and Learned Prefence, I Difcourfe 
have formerly had occafion to fhew the Experiment. (2) of Mixturé 
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